These elements you want to remove come from the theme you’re using.
As you’re using a commercial theme (Semplice5), WordPress support volunteers here are unable to install your theme to see if there are any built-in features to disable these items.
The only solution we can offer you over here is to hide them with custom CSS code.
“Publish by [user] in category”
If you want to hide this site-wide, use:
.category-meta {
display: none;
}
If you want to hide it only on the “News” page, use this INSTEAD:
.blog .category-meta {
display: none;
}
comments are off for the post
I’m supposing you want to keep the date. This one gets a little tricky because there’s no separation between the date and the comment text. Luckily, the date is linked so we can use two styles: one to hide everything, and the second to show the date.
.post-heading > p {
visibility: hidden;
}
.post-heading > p a {
visibility: visible;
}
As before, if you want to do this for ONLY the “News” page, stick .blog
in front of each selector: use this INSTEAD:
.blog .post-heading > p {
visibility: hidden;
}
.blog .post-heading > p a {
visibility: visible;
}
NB: the code above should go into APPEARANCE => CUSTOMIZE => ADDITIONAL CSS.
Good luck!